Shouldering attachment



June 7 1927.

c.- B'. WARREN sHoiJLDERING ATTACHMENT Filed May 29. 1926 INVENTOR @lema/7i @JV/"en,

l ATTORNEY rijatenterl June if, E92?.

`Vc.oini'ii'iiiiv avi/'Annuaires NoRFoLKQvr-Rsinin.

` sneu.Lnnnrivof` ATTACHMENT. g A' Appiication'aiea-May ze,l ieaefA Seraing/naait; Y

Y My inventionjhas for itsfpurpose to en able dentists to prepare quickly and easily teeth for porcelain jaclretcrowns. V The invention comprises a tool adapted to be used with the usual hand piecefof` a dental drilling engine; and provided-'with Y y ception of the bearing sleeve ll which hold s` milling cutters, of thesleeve type,` specially Aii V"tached to a dentalV hand designed andv quickly detachable,` the `tool haviing provisions whereby the'cutter mayl be givena simplegrotational movement or a combined rotation and' reciprocation in orderto make the shoulder conform to the general outline oit' the' gum both anterior,v

posteriorly, inesio,-distally, thereby producing an ideal shoulder for porcelain jacket crown restoration.

ith other objects in View; the invention also residesinthose novel details ofconstruction, combination and arrangement of parts/all of which willbe first fully' `flescribed, then be ls peciiically'pointed out iii vice ready foriise, its positionfwheii 4atcated in dotted lines.

Figure 2-is an' inverted plan View ofthe device shown' in Figure l, the cutter beingi removed.

Figure 3 is an"` enlarged cross section' on the line 3 3 on Figure 2, looking inthe direction of the arrow..

Figure 4 is a view similar' toFigurel 3" with a cutter in vplace and with a depth gauge nonconductortip in position.

Figure 5 is la section on the line 5 5 of Figure` 3. "i 1" .Figure 6 is a detailv the cutter driving' head.

rFigure 7 isa detail View of the first used cutter and a tooth which has been partially cut by it. y i

Figure 8V is a detail Viewv of the second used or iinishing cutter and a tooth,'t he out of which has been completed by the same.

Iiigure 9 isl a View of the tooth showny in2 vFigure 8 taken at right angles to Vthe position of Figure 8.

In the drawing in' which like numerals of Vreference. indicate like parts in all of the*V figures` l represents Athe housing which has' the drilled projectiony 2 for the reception of the Worin 3, the projection havingitsends tapped to receive I respectivelythe'bearing vscrew '4 and the hand Vpiece socket 5,"thelatvv piece lbeing indi# herspective 'View rot" rter having a bearing lt'oithe worin shaft.` Y `The socket. 5 'for receiving'the hand piece v ot thedental drillingengine is provided with spring lioldiiig'tonguesS for tlieusual purpose. i* i The housingrl hasn socket 9-ior'the` rei l2 having a bearing' 'llin the ho'usingl 13 for the worin gear. 1

A light spring 14 is-carried' bythe bearing sleeve to hold the Vcutter driving 'head l5 against' dropping out.

cutter driving vhead maybe turned with and bythe worm `gear and still be free for rret ciprocating movement along its axis "for j a".

purpose preseiitlyto appear'.

The cuttery driving headv 15 is fprovidedif."

with' a. shallow annular groove i8l on itsfpe-v groove 181isf'designechto receive the light' spring l4-to 'prevent the cutter driving head ed pin with milled head that screws into the housing'l'and projects along the axis or the worm'gear andthe cutter driving head, proiirom leaving its bearing sleeve l0 .acciden i tally. l J A. v i i vvrlhe cutterdriving headv l5 .has @bore 2O jecting-through' the cutter driving headinto y Vthe cutter where 'it Imay, receive la tip 23,

having springy split sleeve 24 to hold iton the depth gauge and having an insulating pad 25 ot'hard rubbervor the liketo engage a seiisitive'to'othff A thumbl screw 26 is provided onwhich l'is ajsliding'` collar A27; the thumb vscrew 26 projecting through a slot 28 inthe housing and being threaded vinto,a fthreaded,aperture `iii the'bea.ring sleeve 10", the thumb screw be- 4ing shouldered so thatit may be screwed1 "tight to thesleeve v10, it' desired. The collar 27", is used for the purposerfof providing a 'square shoulder on the non-circular housing i'or the thumb screw 26.. t

The thumb screw 2 6 is drilled to vreceive the headed engaging pin $29, the head vofwhich yis adapted lto lie inf countersunk portion 'of lthe hea'doit' 'the lthumb'sc rew. l

The engaging pin is provided with .two an,`v` Y 70 The cutterfdriving head 15 has-slot's'd to iitxtlie worm gear lugs. 17 so lthat the nular recesses spacedv apart, as indicated,

Vand having for their. purposethe :reception of a latching pin the latching pin 30 v.beneath the head ofS the'engaging pin so that it can be brought out in order to disconnect itfroin the cam groove 19. of the cutter driving 'head when it is desired that the cutter driving head shall undergo rotative Inovement'onlv.

In .connection with my invention provide sets of cutters, there heing two cutters toa set,.and thesets being madewith pairsY off cutters of .ditferent sizesto meet the requirements of practice. The first cutter 35 it Willbe seen is a millingcutter of the sleeve type having agbayonet slotted shank 3G by means of Which .it may be secured to thecutter driving head.. This Glitter 35 is provided with cutting teeth on its 'periphery f and it is also provided -iuteriorly `with tintes, the iiutes' beingvery allow, yustenough 'to give cutting clearance.

.The second cutter of, thefsetfnumhered 38 in ,the drawing isfthe finishing` cutter. This cutter is .provided with diametrically oppositesets of cutting ypoints 3,9,V with squarek portions between the same. VIt is of the same diameter inside .and out but .is knot :fiuted inside as isthe cutter 35,.

1t() designates the tooth, showing the. saine as cut by means -ofnthe cutter 35 andl 41 designates the same tooth after the cut has beentfinished by use of the .cutter 3.9. l

In using my invention, the cutter 3,8 is.

first employed, the depth gauge` being set to permit this cutterA vto make its out t0 the required depth. liVhen using `the cutter 35, the engagingv pin 29.- is withdrawn from the cani -slot`19 of the cutter driving head and a simple rotary movement is imparted tothe cutter. As soon as the preliminary cut has been made by this cutter `35. it is, removed and the finishing cutter 38 put. in. its place. The engaging. pin 2,9, is then pressed in- Wardly soV as to enter, the cam slot 19 Whereby When the shaft Tjis. turned the cutter 38 will receive not only a rotational movement on its. axis but a reciprocating movement as `Well, thus giving to. the remainder of theV cutan undulated form, as shown on the tooth 41 in the drawing.

It Will b-e noted that the engagingpin 29 is free to turn on its axis landy thus acts; as a vroller in the cam groove 19, thereby, reducing, friction and Wear. at the point of contQt.

From the, foregoing, itwilly be. seen. that the hearing forthe engaging pin 29, e., the thumb screw' 26, may be rotated through one-fourth of, the circumference of the hous-V ing and can be clamped at any point Withiny the are, making it possible for the operatmI to time the oscillations or reciprocations of the cutter Without yhaving to hold the hand piece in an awkward position. In other words he can adjust the position ofthe cutter with respect to the position; of .the han."l

piece'so that the undulaggtions willbecutl in the required or desired position on the toot-h without changing theposition of the handrpiece from that positioni which the operator may find most convenient.

The depth gauge thatpasses .through the center of the housing is; provided, as before stated, with anr yinsulated tip, this tipbeing adapted to .rest on the tooth being prepared. and. the depth gauge screwV ensures,- av satis factory rest as vieil as; a gauge for the .depth of the shoulder being milled;

The relative, speedy of lthe cutter .is slow,

making the cutting easy to control and at the sain-e .time keeping .the heat 4created by the cutting friction atfa minimum. The purpose of the up and dow-n movementjof the cutter is to permit the shoulder toconform to ,ther

general outline otgthe gum,Y both anterior,

posteriorly, inesio and. distalzly, and kthus yproduces, as before stated, `anidtal shoulder for porcelain jacket crown restoration.

From the foregoing description, tak-en in connection Withf'the accompanying`v drawv ings, it is thought the construction, opera-v tion and ,uses of my invention 'will be read-v ily clear to thQSe skilled in the art. V

,"What I claim is:

1 a device of thel character described, a housing, a'eutter driving head, a .cutter carried by the driving head, means for mounting said head Within said hemel/n.1?" or rotational and reciprocarory motion, a driving'Y shaft and drivnggear-ing between said shaft and said cutterdiiving head .to rotate said cutter driving headV and said. cutter around. a common, aXS, and means enges'- ing said cutter Yhead and Said casing .tofcaue said cutter toV be `reciprocated along its asis as .it is being rotated around itsexis, thereby giving the cutter. a.' .vibratory motion`v around its axis.

2. In a device ofthe character described, a housing, a cutter driving head, a cutter carried by .the driving head, lmeans for mounting said head Within said Vhousing for rotational and reciprocatory motion, a driving shaft and driving gearing .between said shaft and said cutter driving head to, rotate saidv cutter drivinghead and saidl cuttefA aroundaconnnon axis, andmeans engaging said cutter head and SaidA Casing tojfcause said cutter to he reciprocated along its axis asf't iS; being rotated. aro-undvv its; axis, there Agiving the cutter.. a `-vibratoryv motion around its axis, and means to adpistthe :position of; said `mounting means. withY respect r4to Y the general;` positionv of the, instrument instrument is held. i a In.v aA device Vof 4the class described, al() Y* position in which the instrument is held, for.

- whereby to vary the -location. of the..cut.'sur.. facesjand therebyradijust the position'there-Jv of Awith respect to the position in Which.the

housing, a worin geariniounted-for rotation within the housing a lworm shaft cooperatey ing,W-itli the gear, .a cutter'driving head journalled in the-housing and connected-to .said worm gear to rotate with it,' asleeveV type milling cutter carried .by said head, and

means associated withy said housing. and .saidcutterljdriving headV .t'OQfCause said driving head to reciprocate along its axis as it is being turned on its axis by the worm gear,

thereby causing said cutter tofcut an undulating surface. i I I 4. In a device of the 'class described, a housing', a worm gear mounted for rotation within the housing, a worm shaft cooperating with the gear, a Acritter driving headjournalled inthe housing and connected to said worm gear to rotate with it, a sleeve type milling cutter carried by said head, nie-ans associated with saidhousing and said cutter driving head to cause said driving head to reciprocate along its axisas it isbeing turned on its axis by the worm gear, thereby causing saidcutter to cut an unclulating surface, and means vfor adjusting said last named means to alter the position oft' the undulat-ions with respect to the general sleeve type milling cutter having separated Vcutting points, connected to said driving head whereby said cutter will cut an undulating surface.

j 6. 'In a device of the character described, a housing, said housing having a chamber, a Worm gear rotatably mounted in said chamber, a driving worin shaft with Worm mounted in said housing to drive said worm gear, a bearing sleeve rotatably mounted in said housing chamber, a cutter driving head rotatably mounted in said sleeve and connected with said worm gear for rotation with the saine, said cutter driving head connection4 with the worm gear having provisionl permittino reciprocation of the cutter driving head aong its axis, said cutter driving'head having a cam slot, an engaging pin carried by said sleeve and entering saidslot,

n tationally in said housinfr.

teny driving head lisfrotated by Vsaid 'worm gear said .piniand cam slotA will. causere ciprocation of the. cutter driving head-@along itsaxis for the purposes specified.

.7; `In', a device ,off `the character described, afhousing, said housing. having achamber, a f.

ymeans for securingfsaid sleeve against'rota.-

tion, all being. arranged whereby as saidcut` .i

Worm gear i'otatably'niounted in said cham-1 bei', a" driving worm shaft with worm inountf ed in, said housing vto drive said worm gear,

a bearing sleeve rotatably mounted. in said housingv chamber., -a .f cutter driving head. ron

tatably Vmoun tedfin said sleeve and vconnected with said wormfge'ar. toi-rotation .with the same, ,said `cutter Y driving head con'nection: with the worin" gear i' having provision `per-1` mitting reciprocation of thejcutter driving head along its axis, said cutter driving head havin@ a cam slot an .enga `in 'v in carried being arranged whereby as Vsaid cutter driving head is rotated by said'I worin gear'said pin and cam slot will cause reciprocation of the `cutter driving head along its axis, and means for securing said bearing sleeve against rotation having provision for adjustu ing thev position of said bearing. sleev.e"ro

8. In a device of the` character a'l housing, a cutter driving head rotatably vand reciprocally mounted yinsaid housing,

drive gearing for turning said cutter head,

said cutter head having a cani-.groove,f.a

tliuin screwcarried by "said housing, an engaging pinmounted in saidvthumb screw to project into-said camgroove, means for hold- Ving said engaging pin infpos'ition, said engaging pin having provisions whereby it may be withdrawn from said cani groove in order that said driving head may be giveneither a simple rotational movement or a combined rotational and reciprocatory movement 'as desired.

described,l f

'by Asaid sleeve and entering said slot, means forsecuring said sleeve against rotation, all-v 9. In adevice of the character described,

a housing, a cutter driving headrotatably and reciprocally mounted in `said housing,

drive gearing for turning said cutter head, said cutter head having a cam groove, ya thumb screw carried by lsaid housing, an engaging pin mounted in said thumb screw to project into said cam groove, `means for holding said engaging pin in position, said engaging pin having provisions whereby it 4may be withdrawn from said'cam groove in order that said driving head mayl be given either a simple rotationalV movementrv ora combined rotational and reciprocatoiy movement. as desired, and means for radjusting the position of said thumbA screw around` the axis of' said housing `for the` purposes specified.l

lOgInjan instrument of the class Vde-` scribed, a housing, a cutter` driving head,

, means for mounting vsaid driving head foi simultaneous rotation .and 'recipizocation in seidy housing, means for turning said cutter head, means for ieoipioChatting Seid. cutter,

tiriving head es it is being turned, and a means foi' mounting said driving headv foi' gauge `passingfintoeeid housing sind through.

s,inniletaneonsv rotation and reeipiocationl in.

said housing, menne .for tunning seid cutter heath-'means forY reciprocating V,said .Cutter driving heardy as it is being turned, @depthseid :cutter driving head, a. milling` cutter detachahly mounted in said cutterdriving head, said depth gauge comprising Y n threaded pin and a depth gaugetip re1noV- ably VmountedV on4 said. pin-and provided? With an. insulating pad for .thepnnpoeee speeied;

12.-An rinetiument o'f-the olaes'deeoribed comprising a housing; a Woim sha-ft and Worm gear in Said housing-j e sleeve type milling cutter havingoppoeed cutting points" separated by clearance epztcee, end nie-ans Within said/housing driven` by said AWorm geel' .for .imparting to Said: Cutter a combined rotational `and f re'oiproentory movement whereby saidv cutter will he rCaused to make an undulating out iol: the purposes specified-L Y COLEMAN B. YVARREN. 

